Which of the following pair of salts produces gas lacking pungent odour with dil. `H_(2)SO_(4)`?
A. `HCO_(3)^(-)` and `HSO_(3)^(-)`
B. `HCO_(3)^(-)` and `CO_(3)^(2-)`
C. `S_(2)O_(3)^(2-)` and `CH_(3)CO_(2)^(-)`
D. `CO_(3)^(2-)` and `CH_(3)CO_(3)^(-)`